Monolithic Power Systems Inc. MP5075LGTF-Z

Overview

MP5075LGTF-Z from Monolithic Power Systems is a 5.5V, 1A low-R_DS(ON) load switch with integrated 80mΩ DMOS FET, fixed 450μs soft-start, output discharge, and thermal shutdown-designed for USB power distribution and portable device rail control where inrush current suppression and compact footprint are critical.

For engineers reviewing the MP5075LGTF-Z datasheet, MP5075LGTF-Z pinout, MP5075LGTF-Z application, or MP5075LGTF-Z equivalent, key selection criteria include its 3V–5.5V input range, <5µA shutdown current, 1.4A current limit, 200ns short-circuit response, and SOT563 package compatibility with space-constrained PCB layouts.

Technical Context

The MP5075LGTF-Z implements a sense-FET-based current-limit architecture with dual-stage overcurrent protection: primary regulation at 1.4A (20µs response) and fast-turn-off at ~7A (200ns response). Its internal charge pump enables full enhancement of the low-R_DS(ON) power FET across the entire 3V–5.5V input range.

It integrates UVLO (2.6V threshold, 200mV hysteresis), EN logic with 1MΩ internal pull-down, thermal shutdown (150°C trip, 30°C hysteresis), and a dedicated 150Ω output discharge path activated during disable-enabling rapid VOUT decay without external components.

Key Specifications

Pinout & Package

The MP5075LGTF-Z is housed in a 1.6mm × 1.6mm SOT563 package with six terminals, two of which (Pins 1 and 6) are no-connect (NC) and may be tied to GND for improved thermal performance per layout guidelines.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar load switch applications.

Compared with TPS22916BLYFPR and NCP3902MUTBG, the MP5075LGTF-Z uniquely combines fixed soft-start, output discharge, and thermal hysteresis in a 1.6mm² package-making it optimal for cost-sensitive, space-constrained USB and SSD power-gating where reliability and minimal external components are prioritized.

Availability

MP5075LGTF-Z is available at Aetrix Electronics and suitable for USB power distribution, solid-state drives, notebook system rails, and portable handheld devices requiring stable component supply, consistent lead times, and long-term lifecycle support.

Supply support for MP5075LGTF-Z includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and power ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MP5075L belongs to MPS's load switch product line, engineered specifically for efficient, compact, and reliable power rail control in portable and USB-powered systems-emphasizing low R_DS(ON), fast fault response, and seamless integration into tight PCB layouts.

FAQ

What is the maximum continuous output current rating for MP5075LGTF-Z?

The MP5075LGTF-Z is rated for 1A continuous output current under recommended operating conditions (T_A = +25°C, θ_JA = 130°C/W). Its internal current limit is set to 1.4A typical, but sustained operation above 1A requires careful thermal design due to power dissipation limits in the SOT563 package.

Can MP5075LGTF-Z be used with a 3.3V input supply?

Yes. The MP5075LGTF-Z operates across 3V to 5.5V input voltage range. At 3.3V, R_DS(ON) increases to 110mΩ (vs. 80mΩ at 5V), resulting in ~110mW conduction loss at 1A-still within thermal limits with proper PCB copper area and via count.

Does MP5075LGTF-Z require an external pull-up resistor on the EN pin?

No. The EN pin includes a built-in 1MΩ pull-down resistor. Leaving EN floating disables the device; driving it above 1.5V (e.g., from a microcontroller GPIO) enables it. No external pull-up is needed unless active-low logic interface is required.

How does the output discharge function operate, and what load conditions trigger it?

The output discharge activates automatically when EN is low and VOUT > 0.8V. It uses an internal 150Ω NMOS path to GND, effective only under light-load conditions (I_LOAD < ~1mA); heavier loads discharge through the main path and render the internal discharge negligible.

Is the 450μs soft-start time adjustable?

No. The soft-start time is fixed at 450μs and internally generated. It cannot be modified with external components. This ensures consistent inrush control without layout sensitivity or component tolerance drift.

What happens during a short-circuit event, and how does recovery work?

Upon short-circuit detection (~7A peak), the MP5075LGTF-Z disables the FET within 200ns, holds it off for 80μs, then attempts auto-retry. If the short persists, it cycles between current limit and thermal shutdown until fault removal, after which normal operation resumes once junction temperature falls below 120°C.